Considering building a small hobby CNC Plasma

As the tittle says I am considering building a small hobby CNC Plasma as a project. I cannot justify a Hypertherm Powermax45

But I have found this from R-Tech. www.r-techwelding.co.uk/plasma-cutter-r-tech-p30c/ If I get this with a machine torch am I likely to get any success with it. Or is it just a toy. I want to build a 1200x600 or 1200x900 size machine.

Thanks for any advise.

Thanks for the response and advise. Then this might be a better model. www.r-techwelding.co.uk/plasma-cutter-r-tech-p50hf/

Amperage Range 15 - 50A
Input voltage/amps 240v 32A
Clean cut mild steel 18mm
Severance cut mild steel 24mm
Clean cut aluminum 13mm
Clean cut stainless steel 13mm
Air consumption 100Ltr/Min (3.5CFM) @ 3.45 Bar (70PSI)
Post flow air Yes - Cools torch when cutting stopped
HF Pilot Arc Starting Yes - Enables easy arc starting
Cooling fan Yes - Cooling fan with thermostatic protection
50amp cutting power at a high duty cycle of 60%

I take it the pilot arc is an advantage as the other had HF start?
I am only looking to cut 5mm max and as a hobby not in production.

Clive, get the 50 amp one with the CNC interface. It is a rebadged unit from Everlast. I started out with one of these. If you ask Rtech nicely, they might sell you a machine torch that is compatible with Hypertherm which will make your life easy. Also push them for cut charts as they sent some to me.

If you use a Mesa THCAD board, it sees the divider resistors as belonging to it so select the 16:1 divider on the plasma cutter but set the divider in Linuxcnc to be 24:1.

There is some more information on this thread at plasmaspider I posted where rtech posted a couple of times under the user name rrossetti

plasmaspider.com/viewtopic.php?f=111&t=23700

If you read carefully, I did mention the CNC socket part number (Weipu SP21 12 pin)

Take the time to fully earth your table as per the recommendations by Hypertherm (they have a document on this) and install an IEC RFI filter on the mains power inlet to keep any RFI noise under control and you will be sweet.

I just saved you about 50-100 hours of stuffing around with this info!

I Will say my Thermal Dynamics (and no doubt Hypertherm) has a much cleaner voltage signal and is not subject to the erroneous voltage divider with THCAD but that could well be becasue its 3 phase.

i like to use
the plasma cutters from HERE
www.expondo.de/plasmaschneider/

i change the HEAD to P80 as it is the most used in the world
cheep and all spare parts within 24h
nozzle sets from 10USD

pl7i92 wrote:

i like to use
the plasma cutters from HERE
www.expondo.de/plasmaschneider/

i change the HEAD to P80 as it is the most used in the world
cheep and all spare parts within 24h
nozzle sets from 10USD

Which model do you use ? I only require to cut 5mm

we use the 400V types as they do run about 6hr per day

but on HOBBY all you need is 250.-
www.ebay.de/itm/PLASMASCHNEIDER-STAHLWER...is-10mm/202565999568

the shop has all on P80 -> head 50Euro ATTANCHEN THERE A 2SETS of P80 as of the CABLE Size
www.ebay.de/itm/P80-CNC-Brenner-Schneidb...AHLWERK/372335022023


look and ask the shop bevor buy

Well thanks but they don't ship to the UK. Also I think they are HF start I thought I needed not pilot arc.

Do I need pilot arc ? (plasma in all new to me)

no you dont
as you start around 1.5 mm above it eill detect the sheet and fire

never got problem on that with the P80


IF You are in the UK
Stamos expondo got a shop there
www.expondo.co.uk/stamos-basic-articles/
GET Plasma into search